EntityQ3087103· pop 7· linked from 15 articlesFrederick C. LeonardSign in to saveAmerican astronomerConnectionsMount VernonEntitydouble starEntityLos AngelesEntityPlutoEntityInternational Standard Book NumberEntitydigital object identifierEntityInternational Standard Serial NumberEntitymeteoriteEntityUniversity of California, BerkeleyEntityUniversity of ChicagoEntityUniversity of California, Los AngelesEntityClyde TombaughEntityJSTOROrganizationbibcodeEntityChicago TribuneEntityMount Wilson ObservatoryEntityQ22908627EntityYerkes ObservatoryEntityAmerican Astronomical SocietyEntityFrancis Preserved LeavenworthEntityCategories1896 births1960 deaths20th-century American peopleAmerican astronomersHyde Park Academy High School alumniPeople from Mount Vernon, IndianaUniversity of California, Berkeley alumniUniversity of California, Los Angeles facultyUniversity of Chicago alumni